Hello Rui,
Did you manage to get your code to produce a PWM output on P0.4 (ch2) and P0.5(ch3) the same way the code in the posting does?
If not take a look at both the Keyfob and USB Dongle Schematic. They can be found in the SWRR071a http://www.ti.com/litv/zip/swrr071a and SWRR072 http://www.ti.com/litv/zip/swrr072. This will show you what those pins are used for when running any of the BLE Examples.
Thanks,
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